US208986A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Improvement in valves
Assignee: —
•
Filing: —
•
Granted: 1878-10-15
•
Expires: 1895-10-15
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:15
CPC Classifications
F; F16; F16K; F16K1/00; F16K1/32; F16K1/34; F16K1/44; F16K1/443; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86928; Y10T137/87016; Y10T137/8704; Y10T137/87917; Y10T137/88038; Y10T137/88046
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1881-10-14 | 1882-04-15 | 1882-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1885-10-14 | 1886-04-15 | 1886-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1889-10-14 | 1890-04-15 | 1890-10-15 | $7700.00 | Window Closed / Lapsed |